A routine method for the determination of 12 elements in small rain water samples is presented. Instrumental neutron activation
analysis is applied for the determination of Mn, Na, Cl, V and Al. Bromine and iodine are isolated by isotope exchange between
the irradiated water and a solution of Br2 resp. I2 in CCl4. Extraction with APDC/MIBK is used for the separation of the shortlived isotopes of Co, V, Cr, Zn and In.